Import ceph 15.2.8

[ceph.git] / ceph / src / isa-l / igzip / aarch64 / lz0a_const_aarch64.h

diff --git a/ceph/src/isa-l/igzip/aarch64/lz0a_const_aarch64.h b/ceph/src/isa-l/igzip/aarch64/lz0a_const_aarch64.h
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+++ b/ceph/src/isa-l/igzip/aarch64/lz0a_const_aarch64.h
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+/**********************************************************************
+  Copyright(c) 2019 Arm Corporation All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in
+      the documentation and/or other materials provided with the
+      distribution.
+    * Neither the name of Arm Corporation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**********************************************************************/
+
+#ifndef __LZ0A_CONST_AARCH64_H__
+#define __LZ0A_CONST_AARCH64_H__
+#include "options_aarch64.h"
+
+#ifdef __ASSEMBLY__
+.set K , 1024
+.set D , IGZIP_HIST_SIZE //  Amount of history
+.set LA , 18 * 16 //  Max look-ahead, rounded up to 32 byte boundary
+.set BSIZE , 2*IGZIP_HIST_SIZE + LA //  Nominal buffer size
+
+///    Constants for stateless compression
+#define LAST_BYTES_COUNT 3 //  Bytes to prevent reading out of array bounds
+#define LA_STATELESS 258 //  No round up since no data is copied to a buffer
+
+.set IGZIP_LVL0_HASH_SIZE , (8 * K)
+.set IGZIP_HASH8K_HASH_SIZE , (8 * K)
+.set IGZIP_HASH_HIST_HASH_SIZE , IGZIP_HIST_SIZE
+.set IGZIP_HASH_MAP_HASH_SIZE , IGZIP_HIST_SIZE
+
+#define LVL0_HASH_MASK (IGZIP_LVL0_HASH_SIZE - 1)
+#define HASH8K_HASH_MASK (IGZIP_HASH8K_HASH_SIZE - 1)
+#define HASH_HIST_HASH_MASK (IGZIP_HASH_HIST_HASH_SIZE - 1)
+#define HASH_MAP_HASH_MASK (IGZIP_HASH_MAP_HASH_SIZE - 1)
+
+.set MIN_DEF_MATCH , 3 // Minimum length of a match in deflate
+.set SHORTEST_MATCH , 4
+
+.set SLOP , 8
+
+#define ICF_CODE_BYTES 4
+#define LIT_LEN_BIT_COUNT 10
+#define DIST_LIT_BIT_COUNT 9
+
+#define LIT_LEN_MASK ((1 << LIT_LEN_BIT_COUNT) - 1)
+#define LIT_DIST_MASK ((1 << DIST_LIT_BIT_COUNT) - 1)
+
+#define DIST_OFFSET LIT_LEN_BIT_COUNT
+#define EXTRA_BITS_OFFSET (DIST_OFFSET + DIST_LIT_BIT_COUNT)
+#define LIT (0x1E << DIST_OFFSET)
+
+
+#endif
+#endif